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超前地质预报是隧道施工中不可或缺的必要步骤,是降低施工过程地质灾害发生、减少灾害损失的重要手段.三维地震波层析成像技术是利用地震波反射原理,采用地震层析成像及全息岩土成像技术的新型超前地质预报技术,在国内应用较少.文中介绍了三维地震波层析成像技术的工作原理及方法,并结合工程地质类比法,对新建大瑞铁路尖山岭隧道进行了超前地质预报.研究结果表明,三维地震波层析成像技术对隧道超前地质预报效果良好,准确率达到90%.
Advanced geological forecasting is an indispensable step in tunnel construction and an important measure to reduce the occurrence of geological disasters and reduce the disaster losses during the construction.Dimensional seismic tomography is the use of seismic reflection theory, seismic tomography and holographic geotechnical This paper introduces the working principle and method of three-dimensional seismic tomography, and combined with engineering geology analogy method, carries on the advanced geology forecast to the Jiansheling tunnel of DARUI Railway The results show that the 3D seismic tomography technique has a good effect on the advanced geological prediction of the tunnel with an accuracy of 90%.